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In the previous document, mysql master-slave databases were deployed through docker: Deploy mysql master-slave architecture in docker mode_ Repair Baron's blog - CSDN blog This paper introduces how to connect and use mysql master-slave database in java code to realize the separation of reading and writing. mybatis-plusPersistence layer frame ...

Article catalogue Catalogue of series articles preface 1, What is pandas? 2, Use steps 1. Import and storage 2. Read in data summary preface Once I entered the editing process, it was as deep as the sea. From then on, long hair was a passer-by OK, stop, not much BB. Let's start with the initial C language. You watchers shou ...

In the daily maintenance of database, developers are the most troublesome. Many times, there will be problems in the server due to the writing of SQL statements, resulting in the depletion of resources. The most dangerous operation is to forget to add the where condition when doing DML operation, resulting in the update of the whole table. How ...

Reading guideTomcat is no stranger to J2EE or Java web developers, but when it comes to real, some people may not know or even have heard of it. So what is real? In short: Realm is a mechanism in Tomcat that provides access authentication and role management for web applications. With Realm configured, you don't need to write web application lo ...

prefaceThe Collapse plug-in can easily Collapse the page area. If you want to refer to the functions of the plug-in separately, you need to refer to Collapse JS, bootstrap already contains this plug-in. You can directly reference bootstrap JS or compressed version of bootstrap min.jsCollapseTo use the link href with attributes or the button dat ...

Commodity management system (stored in database) brief introduction For the first time, if there is an error in my blog, I can send a private letter. Thank you for your correction. If you can write, I hope you can pay attention to it, and will continue to update the learning process and make progress together. The source code is at the end ...

catalogue 1. Renderings: 2. Preparation tools: 3. Download code 4. Deployment project 1. Open wechat applet: 2. Viewing method of appid: 3. Take out your small mobile phone, scan the code  5. Modify course  6. Project release 1. Renderings: 2. Preparation tools: Wechat developer tools : wechat applet developme ...

Tomcat tuning First, open Tomcat / conf / server XML file, search Executor name = "tomcatThreadPool", open and adjust to: <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="500" minSpareThreads="20" maxSpareThreads="50" maxIdleTime="60000"/> Then, modify the < connector... > node, add the executo ...

1. Content The operation has been completed. Here are some codes to share. 2. T2 1. ORB extraction void computeAngle(const cv::Mat &image, vector<cv::KeyPoint> &keypoints) { int half_patch_size = 8; // int half_boundry = 16; int bad_points =0; //A point in a corner where an angle cannot be calculated for (auto & ...

MediaDevices.getUserMedia() will prompt the user to grant permission to use media input. Media input will generate a MediaStream containing the track of the requested media type. This stream can contain a video track (from hardware or virtual video sources, such as cameras, video capture devices, screen sharing services, etc.), an audio track ( ...